Magazine for a typewriter ribbon spool

ABSTRACT

A magazine for holding a typewriter ribbon spool on a typewriter frame comprises a substantially cylindrical flat container having a lid wall with a centering pin formation engageable with a hollow pin and an opposite or bottom wall spaced therefrom by an amount to accommodate the typewriter ribbon spool therebetween. A centering ring or supporting rim is defined on one of the walls, for example, the bottom wall, and it provides means for centering the spool around the centering pin formation. The lid wall includes means for centering the spool around the centering pin formation and for locating the inner periphery of the spool. The magazine also includes engagement means in the form of recesses and projections which are engageable with complimentary means on the typewriter for holding the magazine against rotation with respect to the typewriter.

[451 Dec. 17, 1974 MAGAZINE FOR A TYPEWRITER RIBBON SPOOL Inventors:Wolfgang Kupferschmidt, Resse;

Dietrich Lison, Hannover, both of Germany Assignee: Firma GuntherWagner, Hannover,

Germany Filed: Oct. 16, 1972 Appl. No.: 297,837

Foreign Application Priority Data Oct. 21, 1971 Germany 7139793 US. Cl.197/151, 197/175 Int. Cl B41j 33/14 Field of Search 197/151, 172, 175;

9/1969 Gallant 197/151 1 2/ 1969 Engle et a1 197/151 3,482,684 12/1969Schladale 197/151 X 3,551,038 12/1970 Bundschuh et al. 242/71.1 X3,589,636 6/1971 Brown 242/683 Primary Examiner-Ernest T. Wright, Jr.Attorney, Agent, or FirmMcGlew and Tuttle [57] ABSTRACT A magazine forholding a typewriter ribbon spool on a typewriter frame comprises asubstantially cylindrical flat container having a lid wall with acentering pin formation engageable with a hollow pin and an opposite orbottom wall spaced therefrom by an amount to accommodate the typewriterribbon spool therebetween. A centering ring or supporting rim is definedon one of the walls, for example, the bottom wall, and it provides meansfor centering the spool around the centering pin formation. The lid wallincludes means for centering the spool around the centering pinformation and for locating the inner periphery of the spool. Themagazine also includes engagement means in the form of recesses andprojections which are engageable with complimentary means on thetypewriter for holding the magazine against rotation with respect to thetypewriter.

4 Claims, 6 Drawing Figures MAGAZINE FOR A TYPEWRITER RIBBON SPOOLBACKGROUND OF THE INVENTION 1. Field of the Invention This inventionrelates, in general, to the construction of typewriter accessories and,in particular, to a new and useful magazine for a typewriter ribbonspool for positioning the spool on the typewriter frame.

2. Description of the Prior Art Contemporary typewriters can be equippedand used with a typewriter ribbon of the conventional kind which may bemounted on a bearing of the typewriter frame so that it may be unwound,or the typewriter may be equipped for operation with a magazine in whichthe ribbon is supplied ready for use and which may be connected for useupon insertion of the magazine. Such magazines are advantageouslydesigned so that they completely enclose the carbon ribbon so that thecarbon ink contained on the foil carrier need not contact the operatorshand nor dirty the parts associated with the typewriter. The ribbonitself is wound on a spool core and it is centrally suspended in themagazine. The known magazines have to be designed according to thedevices available on the typewriter and this results in an extensivestock-keeping because not every magazine is suitable to be fitted onevery typewriter.

SUMMARY OF THE INVENTION The present invention provides a magazine for atypewriter ribbon which is suitable for use with several types oftypewriters because the size and the arrangement of the centering ringor supporting rim for the spool guide of the typewriter ribbon and thearrests for the rotation-proof bearing and holding of the magazine aredesigned to permit use with a large variety of typewriters. The interiorwalls of the magazine are provided with a centering ring or supportingrim for the typewriter ribbon spool core and the outer sides of themagazine are provided with engagement elements, spaced from a centeringpin formation, for engaging the magazine with the typewriter in aposition in which it will not rotate with respect to the typewriter. Thecentering ring or supporting rim for centering the magazine in themagazine container comprises a cam crown or a ring forming an inturnedannular flange on the inner side of either a lid portion or a bottom ofthe magazine walls which define edges for positioning the inner edge ofthe typewriter ribbon spool.

The engagement devices on a magazine for insuring the anchoring of themagazine on the typewriter against rotation may comprise, for example,recesses between rimmed flanges of the magazine walls or projections orrecesses formed on the magazine walls which are engagable withcomplimentary projections or recesses on the typewriter. In thepreferred arrangement one or two of the planar surfaces of the magazineare provided with cam projections, springy tongues or the like, whichengage with corresponding recesses of the magazine container of thetypewriter.

A centering pin is arranged at the point of rotation of the magazine andcan be a non-circular formation at its outside surface such that, whenit engages with a corresponding hollow pin on a magazined container ofthe typewriter, the centering pin formation and the hollow pin cannotrotate relative to each other.

Accordingly it is an object of the invention to provide an improvedmagazine construction for holding a typewriter ribbon spool, on atypewriter, which includes means for centering the spool in the magazineand means on the magazine for holding the magazine against rotation whenit is inserted into a typewriter.

A further object of the invention is to provide a typewriter ribbonspool which is simple in design, rugged in construction and economicalto manufacture.

For an understanding of the principles of the invention, reference ismade to the following description of typical embodiments thereof asillustrated in the accompanying drawing:

BRIEF DESCRIPTION OF THE DRAWING In the drawing:

FIG. 1 is a top plan view of a magazine for a typewriter ribbonconstructed in accordance with the invention;

FIG. 2 is a section taken along the line 2-2 of FIG.

FIG. 3 is a bottom plan view of the magazine shown in FIG. 1;

FIG. 4 is a section taken along the line 4-4 of FIG.

FIG. 5 is a section taken along the line 55 of FIG. 3; and

FIG. 6 is a section taken along the line 6-6 of FIG.

GENERAL DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to thedrawing in particular, the invention embodied therein comprises atypewriter ribbon magazine which comprises a generally flat cylindricalcontainer 50 having a first wall portion or lid 1 which is connected toa second wall portion or bottom part 2, for example, by means of pressfasteners 3. The bottom part 2 includes flanges 4 which project beyondthe lid edge and which include discontinuous portions or recesses 5therebetween which form arrests or engagement members for therotation-proof bearing and holding of the magazine in the magazinecontainer of a typewriter. The magazine advantageously includes acentering pin formation 6 defining a point of rotation for the magazine.The bottom part 2 also includes a handle formation 7 for the simplefitting of the magazine into the typewriter. An opening or an aperture 8is defined at one location around the periphery of the cylindricalcontainer 50 for the passage of the ribbon 9 therethrough.

As shown in FIG. 2 a carbon ribbon 9 is wound on a spool 13 whose core10 which is adapted to rotate freely around the centering pin formation6. The magazine as a whole is advantageously centered on a hollow pin 11which is carried by the typewriter (not shown). However, in the casethat the typewriter does not have a hollow pin 11, the spool core 10 iscentered with the aid of a ring or supporting rim 12, comprising a camcrown or ring forming an inturned annular flange which as shown in FIG.2, rests against the inner edge of the outer spool face 14. In addition,the magazine carries engagement means in the form of projections 15, 16or 17 which are all defined on the outside bottom part 2 and which areengagable with similar elements or complimentary elements of thetypewriter (not shown). The engagement of the engagement means includingthe projections 15, 16 and 17 as well as the recesses with complimentaryparts of the typewriter will result in the holding of the magazine inthe magazine container of the typewriter against rotation.

The cross sectional form of the projections 15, 16, and 17 are shown inFIGS. 6, 5 and 4 respectively.

While specific embodiments of the invention have been shown anddescribed in detail to illustrate the application of the principles ofthe invention, it will be understood that the invention may be embodiedotherwise without departing from such principles.

What is claimed is:

l. A magazine for holding a typewriter ribbon spool having an inner edgeon a typewriter frame, comprising a substantially cylindrical flatcontainer having a lid wall with a typewriter spool centering pinformation and an opposite wall spaced therefrom by an amount toaccommodate the typewriter ribbon spool therebetween, a centering ringon the opposite wall for centering the spool around said centering pinformation, and engagement means defined on said container for anchoringsaid container against rotation with respect to said typewriter, saidcentering ring comprising an individual end formation on said oppositewall defining a bearing wall opposing the inner edge of the typewriterribbon spool, and said centering pin formation comprising an indentationhaving an interior solid wall portion of circular configuration forcentering the typewriter ribbon spool, whereby said magazine isengageable and useable with a variety of typewriter models without thenecessity of passing bolt means completely through the magazine tosecure the magazine to the typewriter frame.

2. A magazine according to claim 1, wherein said engagement meanscomprises flange portions of one of 5 said walls located at spacedcircumferential locations and defining recesses therebetween.

3. A magazine according to claim 1, wherein said engagement meanscomprises a projection formed on one of said magazine walls.

4. A magazine for holding a typewriter carbon ribbon spool having acarbon ribbon and an inner edge thereon completely enclosed therein foruse with a plurality of different typewriter models, said magazinecomprising a substantially cylindrical flat container having a lid wallwith a typewriter ribbon spool centering pin formation and an oppositewall spaced therefrom by an amount to accommodate the typewriter carbonribbon spool therebetween, a supporting rim on the opposite wall of saidcontainer for centering the typewriter carbon ribbon spool around saidcentering pin formation, and engagement means defined on said containerfor anchoring said container against rotation with respect to atypewriter, frame of a typewriter, said supporting rim comprising anindividual end formation on said opposite wall defining a bearing wallopposing the inner edge of the typewriter ribbon spool, said engagementmeans comprising a. flange portions of one of said walls located atspaced circumferential locations and defining recesses therebetween, and

b. at least one projection formed on the opposite wall of the magazineengageable with the typewriter, said centering pin formation having aninterior solid wall portion of circular configuration for centering thetypewriter carbon ribbon spool, whereby said magazine is engageable anduseable with a variety of typewriter models without the necessity ofpassing bolt means completely through the magazine to secure themagazine to the typewriter frame.

1. A magazine for holding a typewriter ribbon spool having an inner edgeon a typewriter frame, comprising a substantially cylindrical flatcontainer having a lid wall with a typewriter spool centering pinformation and an opposite wall spaced therefrom by an amount toaccommodate the typewriter ribbon spool therebetween, a centering ringon the opposite wall for centering the spool around said centering pinformation, and engagement means defined on said container for anchoringsaid container against rotation with respect to said typewriter, saidcentering ring comprising an individual end formation on said oppositewall defining a bearing wall opposing the inner edge of the typewriterribbon spool, and said centering pin formation comprising an indentationhaving an interior solid wall portion of circular configuration forcentering the typewriter ribbon spool, whereby said magazine isengageable and useable with a variety of typewriter models without thenecessity of passing bolt means completely through the magazine tosecure the magazine to the typewriter frame.
 2. A magazine according toclaim 1, wherein said engagement means comprises flange portions of oneof said walls located at spaced circumferential locations and definingrecesses therebetween.
 3. A magazine according to claim 1, wherein saidengagement means comprises a projection formed on one of said magazinewalls.
 4. A magazine for holding a typewriter carbon ribbon spool havinga carbon ribbon and an inner edge thereon completely enclosed thereinfor use with a plurality of different typewriter models, said magazinecomprising a substantially cylindrical flat container having a lid wallwith a typewriter ribbon spool centering pin formation and an oppositewall spaced therefrom by an amount to accommodate the typewriter carbonribbon spool therebetween, a supporting rim on the opposite wall of saidcontainer for centering the typewriter carbon ribbon spool around saidcentering pin formation, and engagement means defined on said containerfor anchoring said container against rotation with respect to atypewriter, frame of a typewriter, said supporting rim comprising anindividual end formation on said opposite wall defining a bearing wallopposing the inner edge of the typewriter ribbon spool, said engagementmeans comprising a. flange portions of one of said walls located atspaced circumferential locations and defining recesses therebetween, andb. at least one projection formed on the opposite wall of the magazineengageable with the typewriter, said centering pin formation having aninterior solid wall portion of circular configuration for centering thetypewriter carbon ribbon spool, whereby said magazine is engageable anduseable with a variety of typewriter models without the necessity ofpassing bolt means completely through the magazine to secure themagazine to the typewriter frame.